[ehxcaet]

Not sure that really applies. You NEED to buy things. Rent/mortgage. Food. Transportation expenses. The guy's right - at this point, why would you ever spend BTC on those transactions when you can spend $ instead?

The reason why you spend any currency instead of buying BTC is because you need to. Not because you're willingly buying something unnecessary to forsake potential earnings in the future.

[icebraining]

Right. I'm not in any disputing Gresham's law; if you have enough USD to cover an expense, you're surely spending it first.

But the idea that "the reason why you spend any currency instead of buying BTC is because you need to" is just plain wrong. You're essentially saying that people spend strictly what they need to live and save every penny beyond that, and can only wonder whatever led you to that conclusion.